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+# v4 Breaking changes
+
+The main change in this breaking release has been the way mini-batching is handled. The data argument in the solve call and the implicit iteration of that in the callback has been removed, 
+the stochastic solvers (Optimisers.jl and Sophia) now handle it explicitly. You would now pass in a DataLoader to OptimziationProblem as the second argument to the objective etc (p) if you 
+want to do minibatching, else for full batch just pass in the full data.